The bulk of their forensic evidence is still to come, but it's unclear if it will be enough to propel the highly circumstantial case against Casey Anthony to a conviction.

Prosecutors are trying to prove Anthony's 2-year-old daughter Caylee was suffocated after duct tape was placed over her mouth in the summer of 2008. The defense contends she drowned in her grandparents' swimming pool.

The state has led jurors through the trail of lies Anthony told friends, family and law enforcement about her child's disappearance. Still, some court watchers say it's the drowning theory that the defense introduced in its opening statement that could ultimately bolster the prosecution's case.